340 ID help

Trying to nail down what my 340 came out of. On the front of the driver side of the block it has GW 340 P3307 0143 which I decode as:

G = 1971 Model Year
W = Windsor mfg plant
340 ci
P = premium fuel
3307 = born on Aug 17, 1970
143rd engine built

The number stamped on the passenger side above the pan looks like 1B149382 but I'd like some help from someone that has looked at more of these than me. I can't get a better pic at this time. If correct, what car would this likely have been installed in?

Can't discern the first number of the casting date but maybe 5 or 8. ?? 7 70

It would be cool if the original car could be reunited. The motor could be made available for that purpose.
Pics.

IMG_2670.JPG

Motor VIN.JPG

IMG_2673.JPG